Ontop
E641815
Ontop is an open-source Ontology-Based Data Access (OBDA) system that enables querying relational databases through semantic web technologies such as OWL ontologies and SPARQL.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ontop canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7115526 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Ontop Context triple: [OBDA systems, exampleImplementation, Ontop]
-
A.
Patnitop
Patnitop is a scenic hill station in the Jammu region of India, known for its panoramic views of the Himalayas, pleasant climate, and opportunities for trekking and winter sports.
-
B.
Sparx
Sparx is the loyal dragonfly companion and health indicator who follows Spyro throughout the Spyro the Dragon video game series.
-
C.
Unisphere
The Unisphere is a giant stainless-steel globe sculpture in Flushing Meadows–Corona Park, Queens, best known as an enduring landmark celebrating global interdependence and space-age optimism.
-
D.
Opañel
Opañel is a Madrid Metro station serving the Carabanchel district in Spain.
-
E.
Heptaplus
Heptaplus is a philosophical and theological treatise by Renaissance thinker Giovanni Pico della Mirandola that offers a complex, symbolic commentary on the creation narrative in the Book of Genesis.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Ontop Target entity description: Ontop is an open-source Ontology-Based Data Access (OBDA) system that enables querying relational databases through semantic web technologies such as OWL ontologies and SPARQL.
-
A.
Patnitop
Patnitop is a scenic hill station in the Jammu region of India, known for its panoramic views of the Himalayas, pleasant climate, and opportunities for trekking and winter sports.
-
B.
Sparx
Sparx is the loyal dragonfly companion and health indicator who follows Spyro throughout the Spyro the Dragon video game series.
-
C.
Unisphere
The Unisphere is a giant stainless-steel globe sculpture in Flushing Meadows–Corona Park, Queens, best known as an enduring landmark celebrating global interdependence and space-age optimism.
-
D.
Opañel
Opañel is a Madrid Metro station serving the Carabanchel district in Spain.
-
E.
Heptaplus
Heptaplus is a philosophical and theological treatise by Renaissance thinker Giovanni Pico della Mirandola that offers a complex, symbolic commentary on the creation narrative in the Book of Genesis.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
OBDA framework
ⓘ
Ontology-Based Data Access system ⓘ SPARQL query engine ⓘ open-source software ⓘ |
| compatibleWith |
OWL 2 QL profile
ⓘ
Protege ontology editor ⓘ |
| developedIn | academic and industrial research context ⓘ |
| domain |
Semantic Web
ⓘ
databases ⓘ knowledge representation ⓘ |
| feature |
OBDA mappings management
ⓘ
SQL query optimization ⓘ federated querying support ⓘ ontology-based query answering ⓘ query rewriting ⓘ reasoning over OWL 2 QL ontologies ⓘ |
| implementsApproach |
ontology-based data access
ⓘ
virtual knowledge graph ⓘ |
| isOpenSource | true ⓘ |
| license | Apache License 2.0 ⓘ |
| mainFunction |
OBDA reasoning
ⓘ
SPARQL-to-SQL translation ⓘ query relational databases through ontologies ⓘ virtual RDF graph generation ⓘ |
| programmingLanguage | Java ⓘ |
| repository | https://github.com/ontop/ontop ⓘ |
| supportsDatabase |
DB2
ⓘ
linked to:
IBM DB2
MariaDB ⓘ MySQL ⓘ Oracle Database ⓘ PostgreSQL ⓘ SQL Server ⓘ |
| supportsInterface |
JDBC
ⓘ
Protege plugin ⓘ SPARQL endpoint ⓘ command-line interface ⓘ |
| supportsStandard |
W3C OWL standard
ⓘ
linked to:
OWL 2 Web Ontology Language
W3C R2RML standard ⓘ
linked to:
R2RML
W3C SPARQL standard ⓘ
linked to:
SPARQL
|
| supportsTechnology |
OWL
ⓘ
Ontology-Based Data Access ⓘ R2RML ⓘ RDF ⓘ SPARQL ⓘ Semantic Web ⓘ |
| useCase |
data integration
ⓘ
enterprise knowledge graph access ⓘ semantic data access ⓘ virtual RDFization of relational data ⓘ |
| website | https://ontop-vkg.org/ ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Ontop Description of subject: Ontop is an open-source Ontology-Based Data Access (OBDA) system that enables querying relational databases through semantic web technologies such as OWL ontologies and SPARQL.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.